
Better Notes
Whimsical
Notion
Startup Notes
Standard Notes
Collected Notes
Notepin
Facebook Notes
ChainMemory
Agentmemory
OpenMemory MCP
Pinecone
Memo.ai
Memori
cognee
MemoryLake
ChainMemory gives your AI agents persistent memory that belongs to YOU โ not to a single vendor.
Save a memory in ChatGPT, recall it in Claude or Gemini. Available via Chrome extension, MCP server (npm), or REST API. Every memory gets a cryptographic fingerprint and project states are anchored with Merkle proofs, so anyone can independently verify integrity โ no trust required.
Memories consolidate into a structured Project Brain (decisions, milestones, risks) instead of a pile of raw notes. Multi-agent native: Claude, Cursor and GPT share one consolidated state. Free tier available.
Better Notes
ChainMemoryWhimsical - The visual workspace for teams.
Agentmemory - Persistent memory for Claude Code, Codex & coding agents
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
OpenMemory MCP - Your private, local memory layer for all AI tools
Startup Notes - Most actionable advice from each Startup School speaker
Pinecone - Search through billions of items for similar matches to any object, in milliseconds. Itโs the next generation of search, an API call away.